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  <title>Starts the session debugging</title>

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</div><hr /><div id="function.apd-set-session-trace" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">apd_set_session_trace</h1>
  <p class="verinfo">(PECL apd 0.2-0.4)</p><p class="refpurpose"><span class="refname">apd_set_session_trace</span> &mdash; <span class="dc-title">Starts the session debugging</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.apd-set-session-trace-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="type"><span class="type void">void</span></span> <span class="methodname"><strong>apd_set_session_trace</strong></span>
    ( <span class="methodparam"><span class="type">int</span> <code class="parameter">$debug_level</code></span>
   [, <span class="methodparam"><span class="type">string</span> <code class="parameter">$dump_directory</code><span class="initializer"> = ini_get(&quot;apd.dumpdir&quot;)</span></span>
  ] )</div>

  <p class="para rdfs-comment">
   Starts debugging to <var class="filename">apd_dump_{process_id}</var> in the
   dump directory.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.apd-set-session-trace-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    <dt>
<em><code class="parameter">
debug_level</code></em></dt>
<dd>
<p class="para">由加上 <em>XXX_TRACE</em>
常量而形成的整数。</p><p class="para">不建议使用
<strong><code>MEMORY_TRACE</code></strong>。这会很慢且似乎不精确。
<strong><code>ASSIGNMENT_TRACE</code></strong> 还未被实现。</p><p class="para">要打开所有跟踪功能(TIMING, FUNCTIONS, ARGS SUMMARY (比如 strace -c)) 则使用 99 作为值。</p>
</dd>

    
     <dt>
<em><code class="parameter">dump_directory</code></em></dt>

     <dd>

      <p class="para">
       The directory in which the profile dump file is written. If not set, 
       the <em>apd.dumpdir</em> setting from the <var class="filename">php.ini</var> file is used.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.apd-set-session-trace-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   没有返回值。
  </p>
 </div>

 
 <div class="refsect1 examples" id="refsect1-function.apd-set-session-trace-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-406">
    <p><strong>Example #1 <span class="function"><strong>apd_set_session_trace()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />apd_set_session_trace</span><span style="color: #007700">(</span><span style="color: #0000BB">99</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p> 
 </div>


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